Reliant EMC

Coupling/Decoupling Networks (CDN)

The Coupling- / Decoupling Networks are used to inject common mode disturbances to Equipment under Test (EuT).
Further the CDNs provide sufficient decoupling between Auxilary Equipment (AE) and disturbance signal.
The requirements for CDN and their application are described in the standard IEC 61000-4-6 (Immunity to conducted disturbances, induced by radio-frequency fields).
CDNs have a common mode impedance of 150 Ohm and are available for a multitude of cable types and connectors.
pdficon small Schwarzbeck CDN Overview Data Sheet

 

Schwarzbeck CDN Quick Selection Decision Tree

 

Cable type
 CDN type
 Application
 Product range
 

M type
  • Mains
  • Unscreened lines
  • Unbalanced lines
  • AC or DC
  • Power supply applications
  • High current
 
CDN M1
CDN M2
CDN M2/3PE
CDN M3 
CDN M3PE
CDN M4
CDN M4PE
CDN M5PE
 
 
AF type
  • Unscreened lines
  • Unbalanced lines
  • Low current
 
CDN AF2
CDN AF3
CDN AF4
CDN AF6
CDN AF8
 
 
 

S type
  • Coaxial cables
  • Shielded lines
  • Screened lines
 
CDN S1 
CDN S2  
CDN S4
CDN S8
CDN S9
CDN S15
CDN S19
CDN S24
CDN S25
 
 
 

T type
  • Unscreened lines
  • Balanced lines
  • Telecommunication ports
  • Unshielded twisted pairs
 

CDN T2
CDN T4
C

 

 
CDN Dimensions
 
 Length L1 
 Lenght L2 
 Width W  
 Height H  
 Case A
225 mm
216 mm
105 mm
108 mm
 Case B
305 mm
266 mm
105 mm
107 mm
 Case C
290 mm
251 mm
165 mm
167 mm
 Case D
-
107 mm
105 mm
48 mm

 


A-Type CDN for coaxial antenna inputs

CNA 280
Schwarzbeck CNA 280

· The CNA280 meets the specifications of the standard CISPR 16-1-2 A1, figure C1 (unit type A) and CISPR 16-1-3, app. B,Fig. 9.
· It is also required to calibrate EMI absorbing clamps like the MDS 21.

pdficon small Datasheet CNA 280 
pdficon small CDN Selection Guide
pdficon small CDN Adapter Guide
 
pdficon small Schwarzbeck CDN Overview Data Sheet

M Series CDN (Coupling / Decoupling Network)
M series for mains application
Frequency range 10 kHz to 80 MHz, 150 kHz to 230 MHz
IEC/EN 61000-4-6

pdficon small Datasheet CDN M Series
pdficon small CDN Selection Guide
pdficon small CDN Adapter Guide
 
S Series CDN (Coupling / Decoupling Networks)
S series for screened or coaxial cables
IEC/EN 61000-4-6
 
pdficon small Datasheet CDN S Series
pdficon small CDN Selection Guide
pdficon small CDN Adapter Guide

T Series CDN (Coupling / Decoupling Networks)
T series CDN for unscreened balanced pairs
IEC/EN 61000-4-6
 
pdficon small CDN Selection Guide
pdficon small CDN Adapter Guide

AF Series CDN (Coupling / Decoupling Network)
Used for all unscreened, unbalanced lines
Frequency range 10 kHz to 80 MHz, 150 kHz to 230 MHz
IEC/EN 61000-4-6

pdficon small Datasheet CDN AF Series
pdficon small CDN Selection Guide
pdficon small CDN Adapter Guide

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